Re: [PSES] unusual conducted emissions question

In the below message, I meant to mention but forgot that if the power switch is fast enough, the LISN looks like 50 ‡ resistive and there should be no ringing from the LISN along the leading edge. For a 5 uH LISN, we¹re looking at a risetime OTOH 100 ns, and for a 50 uH LISN, under 1 us. These

Re: [PSES] unusual conducted emissions question

Well of course the switching device cycling the power is between you and the electrical system. Where else would it be? The point is switching is done between the common impedance of the bus (modeled by the LISN) and the switched load. You cannot switch on the power input side of the LISN (unless

Re: [PSES] unusual conducted emissions question

Hi Doug et al, Two things spring to mind : If we take the position that the LISN is an accurate representation of the line impedance (as set in the standards) the there no option other than to deal with the inrush current and "fix" it (or find something in the standard that addresses this issue

Re: [PSES] unusual conducted emissions question

Hi Doug, Thinking aloud here: This strikes me as more of a flicker/inrush current kind of problem, whereas conducted emissions would be more of a steady state problem. In the AC mains flicker test it's a "stiff" supply and a series impedance over which to measure the inrush current. In